*Heading
 CPE4 elements; Static Step
** Job name: trial_spring_in_part Model name: Model-1
**
** PARTS
**
*Part, name=Sqr
*End Part
**
** ASSEMBLY
**
*Assembly, name=Assembly
**  
*Instance, name=Sqr-1, part=Sqr
*Node
      1,          -1.,           1.
      5,          -1.,          -1.
     21,           1.,           1.
     25,           1.,          -1.
*Element, type=CPE4
 1,  1,  5,  25,  21
*Elset, elset=_I1, internal
  1,
*Solid Section, elset=_I1, material=Elas
1.,
*node
201, 0.0, 2.0, 0.0
*mpc
beam, 1, 201
beam,21, 201
*element,type=mass,elset=mass
200001,201
*mass,elset=mass
40,
*End Instance
*Nset, nset=nref, instance=Sqr-1
 201,
*End Assembly
*initial conditions, type=velocity
Assembly.Sqr-1.201, 1, 0.1
Assembly.Sqr-1.201, 2, 0.05
** 
** MATERIALS
** 
*Material, name=Elas
*Density
10.,
*Elastic
 1e+08,0.
** ----------------------------------------------------------------
** 
** STEP: Stp1
** 
*Step, name=Stp1, inc=1000, nlgeom
Rigid Body Rotation
*Dynamic,alpha=-0.05,nohaf
0.1, 1.
*controls,param=field
1.e-8,
*Restart, write, frequency=1
*output, history
*node output,nset=nref
u,v
*output,field
*node output
u,
*element output
s,
*End Step